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Specialisatie van BasicData voor intensiteit: TrafficFlow

Intensity data is encoded using the TrafficFlow specialization.

The complete structure is shown below. In the Dutch Profile, only vehicleFlow is applied.

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Elements

Element Type Mandatory Domain Description
vehicleFlow VehicleFlowValue Yes N/A The vehicleFlow element is a specialization of VehicleFlowValue, which is itself a specialization of DataValue

Sub-element vehicleFlow

Attribute Type Mandatory Domain Description
accuracy Percentage No >= 0, <= 100 Not used in the Dutch Profile
computationalMethod ComputationMethodEnum Only if different from the specification in the measurementSite See explanation
numberOfIncompleteInputs NonNegativeInteger Only if available and relevant for the used computational method >= 0 The number of incomplete observations over a period
numberOfInputValuesUsed NonNegativeInteger Only if available and relevant for the used computational method >= 0 The number of observations used during a measurement period to calculate a value
smoothingFactor Float No >= 0 Not used in the Dutch Profile
standardDeviation Float No >= 0 The spread of individual observations over the measurement period
supplierCalculatedDataQuality Percentage Only if different from the specification in the measurementSite >= 0, <= 100 A quality indicator assigned by the data provider
Element Type Mandatory Domain Description
dataError Boolean No true, false Indicates whether an error has been detected with this measurement point, see explanation
reasonForDataError MultilingualString No Max. 10 characters Error code for the data error
vehicleFlowRate VehiclesPerHour Yes >= 0 The number of vehicles passing the point per hour based on the measurement period

Sub-attribute computationMethod

The computationMethod element describes the calculation method used to compute the values reported for this measurement site. The following possible values are available:

  • arithmeticAverageOfSamplesBasedOnAFixedNumberOfSamples: Arithmetic average over a fixed number of values, i.e., A = (v1 + v2 + … + vn) / n, with n fixed;
  • arithmeticAverageOfSamplesInATimePeriod: Arithmetic average over values in a fixed time period, i.e., A = (v1 + v2 + … + vn) / n, with n variable;
  • harmonicAverageOfSamplesInATimePeriod: Harmonic average over values in a fixed time period, i.e., H = n / (1/v1 + 1/v2 + … + 1/vn), with n variable;
  • medianOfSamplesInATimePeriod: Median of the values in a fixed period, meaning half of the values in that period are less than or equal to the median M;
  • movingAverageOfSamples: Moving average over values, i.e., At=1 = ((n-1) * (At=0/n) + vn)/n, with n fixed.

Sub-element dataError

If a measurement point or measurement section does not provide data or if the data provider determines that the data is unreliable, the following attributes must be filled for each data type:

  • The vehicleFlow element will have the value “0”
  • The dataError element will be set to “true”
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